<!DOCTYPE html>
<html lang="en">

<head>
    <title>0413</title>
    <script src="js/vue.js"></script>
</head>

<body>
    <div id="app">
        <div v-if="flag">Yes</div>
    </div>
</body>
<script>
    var vm = new Vue({
        el: "#app",
        data: {
            flag: true
        }
    })

</script>

</html>